EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:bosch
LIBS:STMicroelectronics
LIBS:Texas
LIBS:vario_tiny-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "Vario Tiny85"
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L ATTINY85-S IC1
U 1 1 587CF7F8
P 8950 2400
F 0 "IC1" H 7800 2800 50  0000 C CNN
F 1 "ATTINY85-S" H 9950 2000 50  0000 C CNN
F 2 "SO8-200" H 9900 2400 50  0000 C CIN
F 3 "" H 8950 2400 50  0000 C CNN
	1    8950 2400
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR01
U 1 1 587DE4E0
P 10400 2750
F 0 "#PWR01" H 10400 2500 50  0001 C CNN
F 1 "GND" H 10400 2600 50  0000 C CNN
F 2 "" H 10400 2750 50  0000 C CNN
F 3 "" H 10400 2750 50  0000 C CNN
	1    10400 2750
	1    0    0    -1  
$EndComp
Wire Wire Line
	10300 2150 10400 2150
Wire Wire Line
	10400 2150 10400 2000
Wire Wire Line
	10300 2650 10400 2650
Wire Wire Line
	10400 2650 10400 2750
Text Label 7100 2350 0    60   ~ 0
SCK/SCL
Text Label 7100 2250 0    60   ~ 0
MISO
Text Label 7100 2150 0    60   ~ 0
MOSI/SDA
Text Label 7100 2650 0    60   ~ 0
/RST
Text Label 7100 2550 0    60   ~ 0
INT
Wire Wire Line
	7600 2150 7100 2150
Wire Wire Line
	7600 2250 7100 2250
Wire Wire Line
	7600 2350 7100 2350
Wire Wire Line
	7600 2550 7100 2550
Wire Wire Line
	7600 2650 7100 2650
$Comp
L SW_PUSH SW1
U 1 1 587DE95C
P 6500 2750
F 0 "SW1" H 6650 2860 50  0000 C CNN
F 1 "SW_PUSH" H 6500 2670 50  0000 C CNN
F 2 "" H 6500 2750 50  0001 C CNN
F 3 "" H 6500 2750 50  0000 C CNN
	1    6500 2750
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6500 2450 7600 2450
$Comp
L GND #PWR02
U 1 1 587DE9BE
P 6500 3050
F 0 "#PWR02" H 6500 2800 50  0001 C CNN
F 1 "GND" H 6500 2900 50  0000 C CNN
F 2 "" H 6500 3050 50  0000 C CNN
F 3 "" H 6500 3050 50  0000 C CNN
	1    6500 3050
	1    0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 587DEA30
P 8150 1200
F 0 "R1" H 7900 1250 50  0000 C CNN
F 1 "100K" H 7950 1150 50  0000 C CNN
F 2 "0805" V 8150 1200 50  0000 C CNN
F 3 "" H 8150 1200 50  0000 C CNN
	1    8150 1200
	1    0    0    -1  
$EndComp
Text Label 8450 1500 2    60   ~ 0
/RST
$Comp
L C C3
U 1 1 587DEF8D
P 6950 1200
F 0 "C3" H 7150 1300 50  0000 L CNN
F 1 "10u" H 7150 1200 50  0000 L CNN
F 2 "0805" H 7250 1100 50  0000 C CNN
F 3 "" H 6950 1200 50  0000 C CNN
	1    6950 1200
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR03
U 1 1 587DF0F9
P 6950 1350
F 0 "#PWR03" H 6950 1100 50  0001 C CNN
F 1 "GND" H 6950 1200 50  0000 C CNN
F 2 "" H 6950 1350 50  0000 C CNN
F 3 "" H 6950 1350 50  0000 C CNN
	1    6950 1350
	1    0    0    -1  
$EndComp
$Comp
L CONN_02X03 J1
U 1 1 587DF313
P 2650 5650
F 0 "J1" H 2650 5850 50  0000 C CNN
F 1 "CONN_02X03" H 2650 5450 50  0000 C CNN
F 2 "PROGRAM" H 2650 6200 50  0000 C CNN
F 3 "" H 2650 4450 50  0000 C CNN
	1    2650 5650
	1    0    0    -1  
$EndComp
Text Label 1900 5650 0    60   ~ 0
SCK/SCL
Text Label 1900 5550 0    60   ~ 0
MISO
Text Label 3450 5650 2    60   ~ 0
MOSI/SDA
Wire Wire Line
	2400 5550 1900 5550
Wire Wire Line
	2400 5650 1900 5650
Text Label 1900 5750 0    60   ~ 0
/RST
Wire Wire Line
	2400 5750 1900 5750
Wire Wire Line
	2900 5650 3450 5650
Wire Wire Line
	8150 1350 8150 1500
Wire Wire Line
	8150 1500 8450 1500
$Comp
L GND #PWR04
U 1 1 587DF8A1
P 3150 5900
F 0 "#PWR04" H 3150 5650 50  0001 C CNN
F 1 "GND" H 3150 5750 50  0000 C CNN
F 2 "" H 3150 5900 50  0000 C CNN
F 3 "" H 3150 5900 50  0000 C CNN
	1    3150 5900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2900 5550 3150 5550
Wire Wire Line
	3150 5550 3150 5400
Wire Wire Line
	2900 5750 3150 5750
Wire Wire Line
	3150 5750 3150 5900
$Comp
L LPS25H U3
U 1 1 587E4DC0
P 8150 5000
F 0 "U3" H 7650 5450 60  0000 C CNN
F 1 "LPS25H" H 8550 4550 60  0000 C CNN
F 2 "LGA:HCLGA-10" H 8150 5000 60  0001 C CNN
F 3 "http://www.st.com/resource/en/datasheet/lps25h.pdf" H 8150 5000 60  0001 C CNN
	1    8150 5000
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR05
U 1 1 587E4E6B
P 8050 5600
F 0 "#PWR05" H 8050 5350 50  0001 C CNN
F 1 "GND" H 8050 5450 50  0000 C CNN
F 2 "" H 8050 5600 50  0000 C CNN
F 3 "" H 8050 5600 50  0000 C CNN
	1    8050 5600
	1    0    0    -1  
$EndComp
Connection ~ 8050 5600
Wire Wire Line
	8050 5600 8250 5600
Connection ~ 8150 5600
$Comp
L R R6
U 1 1 587E4FA7
P 8050 4100
F 0 "R6" H 8250 4150 50  0000 C CNN
F 1 "22" H 8250 4050 50  0000 C CNN
F 2 "0805" V 8050 4100 50  0000 C CNN
F 3 "" H 8050 4100 50  0000 C CNN
	1    8050 4100
	1    0    0    -1  
$EndComp
Wire Wire Line
	8050 4250 8050 4400
$Comp
L C C4
U 1 1 587E5082
P 8950 5200
F 0 "C4" H 9150 5300 50  0000 L CNN
F 1 "10u" H 9150 5200 50  0000 L CNN
F 2 "0805" H 9250 5100 50  0000 C CNN
F 3 "" H 8950 5200 50  0000 C CNN
	1    8950 5200
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR06
U 1 1 587E5088
P 8950 5350
F 0 "#PWR06" H 8950 5100 50  0001 C CNN
F 1 "GND" H 8950 5200 50  0000 C CNN
F 2 "" H 8950 5350 50  0000 C CNN
F 3 "" H 8950 5350 50  0000 C CNN
	1    8950 5350
	1    0    0    -1  
$EndComp
Connection ~ 8050 4400
Connection ~ 8250 4400
Connection ~ 8950 4950
Connection ~ 8950 5050
Wire Wire Line
	8050 4400 8950 4400
Wire Wire Line
	8950 4400 8950 5050
$Comp
L R R7
U 1 1 587E53E8
P 7100 5350
F 0 "R7" H 6950 5400 50  0000 C CNN
F 1 "100K" H 6950 5300 50  0000 C CNN
F 2 "0805" V 7100 5350 50  0000 C CNN
F 3 "" H 7100 5350 50  0000 C CNN
	1    7100 5350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR07
U 1 1 587E5414
P 7100 5600
F 0 "#PWR07" H 7100 5350 50  0001 C CNN
F 1 "GND" H 7100 5450 50  0000 C CNN
F 2 "" H 7100 5600 50  0000 C CNN
F 3 "" H 7100 5600 50  0000 C CNN
	1    7100 5600
	1    0    0    -1  
$EndComp
Connection ~ 7100 5100
Text Label 6150 5100 0    60   ~ 0
INT
Wire Wire Line
	7100 5100 7100 5200
Wire Wire Line
	7100 5500 7100 5600
$Comp
L R R5
U 1 1 587E5669
P 7100 4650
F 0 "R5" H 6950 4700 50  0000 C CNN
F 1 "100K" H 6950 4600 50  0000 C CNN
F 2 "0805" V 7100 4650 50  0000 C CNN
F 3 "" H 7100 4650 50  0000 C CNN
	1    7100 4650
	1    0    0    -1  
$EndComp
Wire Wire Line
	7100 4800 7100 4900
$Comp
L R R4
U 1 1 587E5738
P 6750 4650
F 0 "R4" H 6600 4700 50  0000 C CNN
F 1 "100K" H 6600 4600 50  0000 C CNN
F 2 "0805" V 6750 4650 50  0000 C CNN
F 3 "" H 6750 4650 50  0000 C CNN
	1    6750 4650
	1    0    0    -1  
$EndComp
Connection ~ 7100 4900
Connection ~ 6750 5000
Text Label 6150 5000 0    60   ~ 0
MOSI/SDA
Text Label 6150 4900 0    60   ~ 0
SCK/SCL
Wire Wire Line
	7350 4900 6150 4900
Wire Wire Line
	7350 5100 6150 5100
Wire Wire Line
	7350 5000 6150 5000
Wire Wire Line
	6750 5000 6750 4800
Text Notes 9550 4850 0    60   ~ 12
Pressure sensor
$Comp
L CP1 C1
U 1 1 587F9EEF
P 2550 1600
F 0 "C1" H 2650 1600 50  0000 L CNN
F 1 "0.22" H 2650 1500 50  0000 L CNN
F 2 "" H 2550 1600 50  0001 C CNN
F 3 "" H 2550 1600 50  0000 C CNN
F 4 "5V5" H 2750 1400 60  0000 C CNN "voltage"
F 5 "10.16" H 2800 1300 60  0000 C CNN "text"
	1    2550 1600
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR08
U 1 1 587FA27C
P 2550 1750
F 0 "#PWR08" H 2550 1500 50  0001 C CNN
F 1 "GND" H 2550 1600 50  0000 C CNN
F 2 "" H 2550 1750 50  0000 C CNN
F 3 "" H 2550 1750 50  0000 C CNN
	1    2550 1750
	1    0    0    -1  
$EndComp
$Comp
L D_Schottky_ALT D1
U 1 1 587FA2C6
P 2100 1450
F 0 "D1" H 2100 1300 50  0000 C CNN
F 1 "ZHCS1000" H 2100 1600 50  0000 C CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 2100 1450 50  0001 C CNN
F 3 "http://www.diodes.com/_files/datasheets/ZHCS1000.pdf" H 2100 1450 50  0001 C CNN
	1    2100 1450
	-1   0    0    1   
$EndComp
$Comp
L Solar_Cell SC1
U 1 1 587FA2FD
P 1700 1650
F 0 "SC1" H 1400 1650 50  0000 L CNN
F 1 "Solar_Cell" H 1200 1550 50  0000 L CNN
F 2 "" V 1700 1710 50  0001 C CNN
F 3 "" V 1700 1710 50  0000 C CNN
	1    1700 1650
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR09
U 1 1 587FA33A
P 1700 1750
F 0 "#PWR09" H 1700 1500 50  0001 C CNN
F 1 "GND" H 1700 1600 50  0000 C CNN
F 2 "" H 1700 1750 50  0000 C CNN
F 3 "" H 1700 1750 50  0000 C CNN
	1    1700 1750
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR010
U 1 1 587FA3AD
P 3450 1900
F 0 "#PWR010" H 3450 1650 50  0001 C CNN
F 1 "GND" H 3450 1750 50  0000 C CNN
F 2 "" H 3450 1900 50  0000 C CNN
F 3 "" H 3450 1900 50  0000 C CNN
	1    3450 1900
	1    0    0    -1  
$EndComp
Wire Wire Line
	2250 1450 3000 1450
Connection ~ 2550 1450
$Comp
L C C2
U 1 1 5880CC07
P 4100 1600
F 0 "C2" H 4300 1700 50  0000 L CNN
F 1 "10u" H 4300 1600 50  0000 L CNN
F 2 "0805" H 4400 1500 50  0000 C CNN
F 3 "" H 4100 1600 50  0000 C CNN
	1    4100 1600
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR011
U 1 1 5880CC13
P 4100 1750
F 0 "#PWR011" H 4100 1500 50  0001 C CNN
F 1 "GND" H 4100 1600 50  0000 C CNN
F 2 "" H 4100 1750 50  0000 C CNN
F 3 "" H 4100 1750 50  0000 C CNN
	1    4100 1750
	1    0    0    -1  
$EndComp
Wire Wire Line
	3900 1450 4100 1450
Connection ~ 4100 1450
$Comp
L PWR_FLAG #FLG012
U 1 1 5880DEE1
P 5000 900
F 0 "#FLG012" H 5000 975 50  0001 C CNN
F 1 "PWR_FLAG" H 5000 1050 50  0000 C CNN
F 2 "" H 5000 900 50  0000 C CNN
F 3 "" H 5000 900 50  0000 C CNN
	1    5000 900 
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR013
U 1 1 5880DFA4
P 5000 900
F 0 "#PWR013" H 5000 650 50  0001 C CNN
F 1 "GND" H 5000 750 50  0000 C CNN
F 2 "" H 5000 900 50  0000 C CNN
F 3 "" H 5000 900 50  0000 C CNN
	1    5000 900 
	1    0    0    -1  
$EndComp
Wire Wire Line
	1700 1450 1950 1450
$Comp
L +5V #PWR014
U 1 1 58811843
P 2550 1450
F 0 "#PWR014" H 2550 1300 50  0001 C CNN
F 1 "+5V" H 2550 1590 50  0000 C CNN
F 2 "" H 2550 1450 50  0000 C CNN
F 3 "" H 2550 1450 50  0000 C CNN
	1    2550 1450
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR015
U 1 1 588119B7
P 5400 900
F 0 "#PWR015" H 5400 750 50  0001 C CNN
F 1 "+5V" H 5400 1040 50  0000 C CNN
F 2 "" H 5400 900 50  0000 C CNN
F 3 "" H 5400 900 50  0000 C CNN
	1    5400 900 
	1    0    0    -1  
$EndComp
$Comp
L PWR_FLAG #FLG016
U 1 1 588119EB
P 5400 900
F 0 "#FLG016" H 5400 975 50  0001 C CNN
F 1 "PWR_FLAG" H 5400 1050 50  0000 C CNN
F 2 "" H 5400 900 50  0000 C CNN
F 3 "" H 5400 900 50  0000 C CNN
	1    5400 900 
	-1   0    0    1   
$EndComp
$Comp
L Buzzer BZ1
U 1 1 5881200C
P 3550 3800
F 0 "BZ1" H 3700 3850 50  0000 L CNN
F 1 "PKMC0909E4000" H 3700 3750 50  0000 L CNN
F 2 "Buzzers_Beepers:Buzzer_12x9.5RM7.6" V 3525 3900 50  0001 C CNN
F 3 "" V 3525 3900 50  0000 C CNN
	1    3550 3800
	1    0    0    -1  
$EndComp
Text Label 1700 3500 0    60   ~ 0
MISO
$Comp
L BC857 Q2
U 1 1 5881213E
P 2550 3900
F 0 "Q2" H 2750 3975 50  0000 L CNN
F 1 "BC857" H 2750 3900 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23_Handsoldering" H 2750 3825 50  0001 L CIN
F 3 "" H 2550 3900 50  0000 L CNN
	1    2550 3900
	1    0    0    1   
$EndComp
$Comp
L BC847 Q1
U 1 1 5881298C
P 2550 3500
F 0 "Q1" H 2750 3575 50  0000 L CNN
F 1 "BC847" H 2750 3500 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23_Handsoldering" H 2750 3425 50  0001 L CIN
F 3 "" H 2550 3500 50  0000 L CNN
	1    2550 3500
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 58812A78
P 3300 3700
F 0 "R3" V 3400 3650 50  0000 C CNN
F 1 "1K5" V 3500 3650 50  0000 C CNN
F 2 "0805" V 3300 3700 50  0000 C CNN
F 3 "" H 3300 3700 50  0000 C CNN
	1    3300 3700
	0    1    1    0   
$EndComp
$Comp
L GND #PWR017
U 1 1 58812DB6
P 3450 3900
F 0 "#PWR017" H 3450 3650 50  0001 C CNN
F 1 "GND" H 3450 3750 50  0000 C CNN
F 2 "" H 3450 3900 50  0000 C CNN
F 3 "" H 3450 3900 50  0000 C CNN
	1    3450 3900
	1    0    0    -1  
$EndComp
Connection ~ 2650 3700
Wire Wire Line
	2650 3700 3150 3700
$Comp
L GND #PWR018
U 1 1 5881392F
P 2650 4100
F 0 "#PWR018" H 2650 3850 50  0001 C CNN
F 1 "GND" H 2650 3950 50  0000 C CNN
F 2 "" H 2650 4100 50  0000 C CNN
F 3 "" H 2650 4100 50  0000 C CNN
	1    2650 4100
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR019
U 1 1 58813ABE
P 2650 3300
F 0 "#PWR019" H 2650 3150 50  0001 C CNN
F 1 "+5V" H 2650 3440 50  0000 C CNN
F 2 "" H 2650 3300 50  0000 C CNN
F 3 "" H 2650 3300 50  0000 C CNN
	1    2650 3300
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 58813B77
P 2200 3500
F 0 "R2" V 2300 3450 50  0000 C CNN
F 1 "100K" V 2400 3500 50  0000 C CNN
F 2 "0805" V 2200 3500 50  0000 C CNN
F 3 "" H 2200 3500 50  0000 C CNN
	1    2200 3500
	0    1    1    0   
$EndComp
Connection ~ 2350 3500
Wire Wire Line
	2350 3500 2350 3900
Wire Wire Line
	1700 3500 2050 3500
Text Notes 3000 2350 0    60   ~ 0
Vdrop = 50mV@50mA\nIq = 85uA
Text Notes 7750 3050 0    60   ~ 0
PWR drain: 300uA@1Mhz
$Comp
L TPS722XX U1
U 1 1 59904118
P 3450 1600
F 0 "U1" H 3200 1900 50  0000 C CNN
F 1 "TPS72218" H 3600 1900 50  0000 C CNN
F 2 "SOT-23-5" H 3700 1400 50  0000 C CIN
F 3 "" H 3450 1600 50  0000 C CNN
	1    3450 1600
	1    0    0    -1  
$EndComp
Connection ~ 2850 1450
Wire Wire Line
	3000 1600 2850 1600
Wire Wire Line
	2850 1600 2850 1450
NoConn ~ 3900 1600
$Comp
L +1V8 #PWR020
U 1 1 59904ABF
P 3150 5400
F 0 "#PWR020" H 3150 5250 50  0001 C CNN
F 1 "+1V8" H 3150 5540 50  0000 C CNN
F 2 "" H 3150 5400 50  0000 C CNN
F 3 "" H 3150 5400 50  0000 C CNN
	1    3150 5400
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR021
U 1 1 59904BCE
P 4100 1450
F 0 "#PWR021" H 4100 1300 50  0001 C CNN
F 1 "+1V8" H 4100 1590 50  0000 C CNN
F 2 "" H 4100 1450 50  0000 C CNN
F 3 "" H 4100 1450 50  0000 C CNN
	1    4100 1450
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR022
U 1 1 59904C99
P 6950 1050
F 0 "#PWR022" H 6950 900 50  0001 C CNN
F 1 "+1V8" H 6950 1190 50  0000 C CNN
F 2 "" H 6950 1050 50  0000 C CNN
F 3 "" H 6950 1050 50  0000 C CNN
	1    6950 1050
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR023
U 1 1 59904D25
P 8150 1050
F 0 "#PWR023" H 8150 900 50  0001 C CNN
F 1 "+1V8" H 8150 1190 50  0000 C CNN
F 2 "" H 8150 1050 50  0000 C CNN
F 3 "" H 8150 1050 50  0000 C CNN
	1    8150 1050
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR024
U 1 1 59904DAF
P 10400 2000
F 0 "#PWR024" H 10400 1850 50  0001 C CNN
F 1 "+1V8" H 10400 2140 50  0000 C CNN
F 2 "" H 10400 2000 50  0000 C CNN
F 3 "" H 10400 2000 50  0000 C CNN
	1    10400 2000
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR025
U 1 1 59904E11
P 8050 3950
F 0 "#PWR025" H 8050 3800 50  0001 C CNN
F 1 "+1V8" H 8050 4090 50  0000 C CNN
F 2 "" H 8050 3950 50  0000 C CNN
F 3 "" H 8050 3950 50  0000 C CNN
	1    8050 3950
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR026
U 1 1 59906C06
P 6750 4500
F 0 "#PWR026" H 6750 4350 50  0001 C CNN
F 1 "+1V8" H 6750 4640 50  0000 C CNN
F 2 "" H 6750 4500 50  0000 C CNN
F 3 "" H 6750 4500 50  0000 C CNN
	1    6750 4500
	1    0    0    -1  
$EndComp
$Comp
L +1V8 #PWR027
U 1 1 59906C7D
P 7100 4500
F 0 "#PWR027" H 7100 4350 50  0001 C CNN
F 1 "+1V8" H 7100 4640 50  0000 C CNN
F 2 "" H 7100 4500 50  0000 C CNN
F 3 "" H 7100 4500 50  0000 C CNN
	1    7100 4500
	1    0    0    -1  
$EndComp
Text Notes 1800 2750 0    60   ~ 0
Autonomy with ultracap. and no power supply\nT = C*(V1-V2)/I\nT = 0.22 * (5-1.8)/0.0005 = 23 minutes
Text Notes 7750 2900 0    60   ~ 12
MICRO
Text Notes 9550 5050 0    60   ~ 0
PWR drain: 100uA@ODR 25Hz\naddress 1011101b
Text Notes 6400 4200 0    60   ~ 0
PWR drain: 2 x 18uA\n(during the reading)
Text Notes 3700 4050 0    60   ~ 0
PWR drain: 1uA@5V
Text Notes 1050 3900 0    60   ~ 0
PWR drain: 12uA on Tone
$EndSCHEMATC
